The engine (Jab 3300) will be another matter. It will probably be purchased from a company in Tennessee and shipped to Sullivan, Missouri. I don't know how that will work out.
You'll likely have to pay the 4.225% Use Tax. As it says on the Missouri web-page, "the purchaser is responsible for remitting the tax to the department if the out-of-state seller does not collect use tax on the transaction."
Here's the link to Missouri's Sales & Use Tax web-page:
http://dor.mo.gov/tax/business/sales/Use Taxes are little known, but with greater and greater use of the internet for ordering stuff (eBay, Amazon, etc.), states are working harder to collect this revenue.
